treatment/vs disease

Sadly, my husband passed away Nov 6. He died of complications from the treatment of his tumor, not the tumor itself. The radiation damaged his brain, causing intractable seizures and increasing damage day by day. For the record it is not supposed to happen like this, and I fel a little cheated, if that"s the right word. We were not truly informed that this could be an outcome of the radiation. I withdrew all treatment except seizure medications and comfort measures 4 days before he died.